Acetylacetone based composite heat stabilizer

A technology of acetylacetone and metal compounds, applied in the preparation of aldehyde/ketone chelates, organic chemistry, etc., can solve the problems of poor coloring, poor long-term performance of zinc acetylacetonate, poor transparency, etc., and achieve the effect of improving thermal stability

Inactive Publication Date: 2009-08-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to combine the advantages of good initial coloring performance of zinc acetylacetonate, good long-term performance of calcium acetylacetonate, good long-term performance of hydrotalcite, and good transparency, and utilize the synergistic effect between each other to overcome the long-term stability of single stabilizer zinc acetylacetonate. Poor performance, poor transparency of calcium acetylacetonate stabilizer, poor initial coloration of hydrotalcite stabilizer, etc., providing a composite heat stabilizer with initial coloring performance, superior long-term performance, good transparency, and high efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Zinc acetylacetonate, calcium acetylacetonate, Mg 3 ZnAL 2 (CO 3 )·2H 2 O hydrotalcite is mixed according to the mass percentage content of 4%, 21% and 75% respectively to obtain a composite heat stabilizer. Add 4 parts by mass of composite heat stabilizer to 100 parts of PVC, then add 50 parts of di-isooctyl phthalate (DOP), and knead at 140°C for 10 minutes on the SSR-Z4 plastic testing machine, and then mix at 160°C Press it into a thin sheet with a thickness of 1mm under certain conditions and cut it into a test piece of 1cm×1cm. Put the test piece in a thermal aging test chamber at 200±1°C for static aging test, and set the time when the test piece begins to appear black decomposition points as the thermal stability time, the results are shown in Table 1.

Embodiment 2

[0024] Zinc acetylacetonate, calcium acetylacetonate, Mg 3 ZnAL 2 (CO 3 )·2H 2 O hydrotalcite is mixed according to the mass percent content of 10%, 39% and 51% respectively to obtain a composite thermal stabilizer. Add 4 parts by mass of composite heat stabilizer to 100 parts of PVC, then add 50 parts of di-isooctyl phthalate (DOP), and knead at 140°C for 10 minutes on the SSR-Z4 plastic testing machine, and then mix at 160°C Press it into a thin sheet with a thickness of 1mm under certain conditions and cut it into a test piece of 1cm×1cm. Put the test piece in a thermal aging test chamber at 200±1°C for static aging test, and set the time when the test piece begins to appear black decomposition points as the thermal stability time, the results are shown in Table 1.

Embodiment 3

[0026] Zinc acetylacetonate, calcium acetylacetonate, Mg 3 ZnAL 2 (CO 3 )·2H 2 The O hydrotalcite is mixed according to the mass percent content of 16%, 51% and 33% respectively to obtain a composite thermal stabilizer. Add 4 parts by mass of composite heat stabilizer to 100 parts of PVC, then add 50 parts of di-isooctyl phthalate (DOP), and knead at 140°C for 10 minutes on the SSR-Z4 plastic testing machine, and then mix at 160°C Press it into a thin sheet with a thickness of 1mm under certain conditions and cut it into a test piece of 1cm×1cm. Put the test piece in a thermal aging test chamber at 200±1°C for static aging test, and set the time when the test piece begins to appear black decomposition points as the thermal stability time, the results are shown in Table 1.

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Abstract

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

Description

Technical field: [0001] The invention relates to a heat stabilizer, which is a composite heat stabilizer composed of zinc acetylacetonate, hydrotalcite, calcium acetylacetonate or magnesium acetylacetonate. technical background: [0002] PVC and other chlorine-containing high polymers undergo a self-catalytic reaction of removing HCl under heat or ultraviolet radiation, which reduces various properties of the material. In particular, the thermal stability of PVC itself is very poor, its flow temperature is 136°C, and its decomposition temperature is 140°C, the difference between the two is only 4°C, which brings great difficulties to processing and use, so a certain amount of heat stabilizer must be added . Heat stabilizer is one of the indispensable main additives in the processing of PVC and other chlorine-containing high polymers. At present, heat stabilizers can be mainly divided into basic lead salts, metal soaps, organotins, rare earths and composite stabilizers acco...

Claims

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Application Information

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IPC IPC(8): C07C49/92C07C45/77C08K13/02C08K5/07C08L27/06C08L23/28
Inventor 李殿卿林彦军刘青宝
Owner BEIJING UNIV OF CHEM TECH
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